not all fish breedable?

[multikill]

can it be that not all fish are breedable?

I just noticed that I don't have a spider crab, Blue Spotted Gazer or Sally Lightfoot Crab in my tank yet

Is that how it should be or am I just extremely unlucky?

[resonance]

Those three require ground (they don't swim) and fish farms are just open water so those three have no where to go, so no. You can not breed them right now. The fish farm does have two (potentially three) not used areas right now so maybe some DLC in the future will change that.

[DFogz]

You cannot breed the following;

Blue Spotted Stargazers
Spider Crabs
Sally Lightfoot Crabs
Sea Urchins
Seahorses
Seadragons
Seascorpions (Megaloraptor)
or the Young Anomalocaris which isn't even in your Marinca